When I was in Los Angeles with my dad once many years ago, he tried to buy some chocolates at the airport but his card was declined. The cashier told him that a message appeared on the machine that he was to call the card centre. My dad was puzzled since he promptly paid his credit card bills each month. Anyway, he called the card centre using his ICC at a public phone booth. In case you are wondering what on earth is an ICC, it was an International Calling Card issued by Singtel for people who were travelling overseas in the past. I don't think ICC exists now. The card centre lady asked him where he was and told him his credit card was used in a petrol station in Johor just two hours ago! Wow! My dad must have had taken something faster than the Concord to travel from ......